Vania



R. W. GRISWOLD STOVE DAMPER Filed Jan. 28, 1926 s w %n N V N E R V m m WA Y B Patented Dec. 11, 1928.

UNITED STA OF ERIE, PENNSYLVANIA, .ASSIGNOE TO THE GRISWOLE MANU-ENNSYLVANIA, A COIzl-lORATION OF PENNSYL- noenn w. eniswonn,

FACTURING C0 VANIA.

MPANY, 0F ERIE, 3?

TBS

PATENT OFFICE.

STOVE DAMPER.

Application filed January 28, 1926 Serial No. 84-314.

Stove dampers are ordinarily provided with damper rods through the whichmay be forced stove pipe and extended through damper receiving openingsin the damper and locked.

Such damper rods and the stove pipe is either with the damper implement.These provided with damper rod shoulders for with the damper plate andthe are ordinarily pointed usually perforated rod itself, or some rodshave been damper locking the wall of the stovepipe adjacent to theopening is enlarged ordinarily by the of the rod itself in opening.

With the manipulation forcing it through the present invention, the

damper plate is formed so that the rod may be inserted end and at thesame time arranged nearer the dle end. Thls gives dle for working thinto the rod opening from either perforation in the stove pipe.

The invention is illustrated in the accoin drawings as follows shows aplan view of the damper.

panying Fig. 1

Fig. 2 a detached view of the rod. Fig. 3 a section on the line 3-8 inFg. 1. Fig. i a section on the line 4& in Fig. 1.

1 marks the damper plate, 2 a minimum opening usually provided in thedamper,

and 3 a rod opening across the damper extending diametrically andordinarily formed by an alternate arrangement of loops extending eachside of the plate.

In the present construction loops 4 are arranged at the edges of thedamper plate, from the loops 4. and center than a loop 5, the loopsinstance at the opposite side ranged in each the loops 5 inwardly theloops 6 nearer the 5 being arfrom the adjacent loops l and 6. The opening at the loop more readily recelve as it passes through vided with a.groove a is slightly tapered so as to the rod and the opening each ofthe loops is proor enlargement through which locking shoulders8 of a rod9 may pass.

10 and handle 11. jaeent to the pointe with the usual point shoulders 8are adthe spring 13 greater length of rod between the shoulders 8 andthe handle 11. After the rod is inserted in a perforation in the stovepipe the shoulders 11 must be worked through this perforation. This isusually accomplished by a manipulation of the rod and. this greaterlength of rod gives a greater leverage in rocking the rod back and forthin working the shoulders through the perforation. A. cup 12 is placedaround the rod at the handle end and a spring 13 is arranged on the rodand positioned in the cup, the spring operating against the handle toforce the rod endwise toward the handle.

Open spaces 14 are formed in the plate acent to the broad opening 3 ofsufficient size to permit the turning of the rod in the opening 3 whenthe shoulders 8 are brought into the spaces 141-. Leading toward thecenter of the plate from the spaces are wedge rod against turning in theplate and locks the rod in place in the plate.

What I claim as new is In a stove damper, the combination of a damperrod having a point, a handle and laterally projecting shoulder morenearly adjacent to the point than to the handle; and a damper platehaving a rod opening shaped to receive the rod froin'either end of theopening and having a: locking surface with an adjacent open space ateach end of the rod opening, the open space permitting the turning ofthe inserted rod in the ()PQ11- .ing to bring the shoulder into positionto 7 engagewith the locking surface upon a rec'iprocative movement ofthe rod.

In testimony whereof I have hereunto set my hand. I

noenn w. (iniswonn moves the shoulders 8 along, .the locking surfaces15'and thus locks the

